hey... I just called Curtis because I just remembered that I had purchased some invitations from Target that I was thinking about printing on... and he said he could print on smaller sheets... I didn't ask him about pricing though. From what I remember it had to do with how many times he had to make a template. One side = one template.
I'm still thinking about which way I want to go... I can still go purchase full sheet cardstock paper and have him cut it down, I don't think it will be that much extra. I purchased a pearlescent cardstock from FasClampitt recently for my engagement programs and it was about $30 for 500 full size sheets. From this, I can make both invitations and reply cards.